HelenOS sources

USBDIAG_DEV_IFACE   59 uspace/lib/c/include/ipc/dev_iface.h 	USBDIAG_DEV_IFACE,
USBDIAG_DEV_IFACE   59 uspace/lib/posix/include/libc/ipc/dev_iface.h 	USBDIAG_DEV_IFACE,
HelenOS homepage, sources at GitHub